<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>文字大小、粗细、倾斜</title>
    <style>
        .size-c {
            font-size: 16px;


        }

        .weight-c {
            font-weight: 700;
        }

        em {
            font-style: normal;
        }


    </style>
</head>
<body>



<p class="size-c">文字大小</p>
<p class="weight-c">文字粗细</p>
<em>文字倾斜</em>

<span>1</span><span>2</span><span>3</span>

</body>
</html>
